Composition of matter for skate-wheels and the like.



JOHN TALBOT, OF CHICAGO, ILLINOIS.

COMPOSITION OF MATTER FOR SKATE-WHEELS AND THE LIKE.

eas es.

It'e Drawing.

To all whom it may concern.

Be it known that ll, JOHN W. TALBOT, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Composition of Matter for Skate-Wheels and the like, of which the following is a specification.

My invention relates to an improved composition of matter for the manufacture of skate wheels and the like, the primary object of the invention being the provision of an extremely tough, unyielding composition which shall include a hardening compound I capable of causing it to resist wear. A further-object of my invention is the provision of a composition of this character which shall be economical to manufacture both because of the ingredients employed and the method of manufacture involved; and a method of compounding the composition by means of which the toughness and hardness above mentioned'may be attained at a mini- 1 mum of labor and expense.

Other objects and advantages of my invention will become apparent from the following description.

y new composition of matter comprises the following parts in substantially the pro-.

portions stated: dry paper, 105 pounds; a mineral hardener, preferably pulverized silica, pounds; potassium bichromate, 1 pound; iron oxid, 2 pounds; glue, 55 pounds; resin varnish, 2 quarts.

In compounding my new composition of matter I take pounds of dry paper, preferably of a uniform grade, soak it in water and thoroughly macerate it until it becomes pulp. This pulp is dried in' a centrifugal machine and then broken up 'into small pieces or particles.

About '60 pounds of a granular hardener, pulverized silica sand being preferable for this purpose, is placed in a revolving drum or shaker and mixed with approximately one pound of potassium bichromate and 2 pounds ofsuitable iron oxid such as crocus or rouge. The combined sand, bichromate and oxid are taken from the shaker and thoroughly inixed with the dried macerated pulp, following which 55 pounds of glue are thoroughly stirred into the mixture. The compound thus obtained is placed in a mechanical mixer and two quarts of resin varnish are added and thorou hly kneaded into,

In; be the The potassium i m.

Specification of Letters Patent.

Patented Nov. 2?, 19117..

Application filed March 23, 1917. Serial No. 157,039.

compound seems to waterproof the glue, the iron oxid is used as a coloring material, and the resin varnish keeps the composition sweet and prevents fermentation which has a tendency to occur While the material is being Worked before the composition becomes thoroughly dried.

The mass resulting from the foregoing steps of the process is fed through an extruding machine which intimately intermingles and interlocks the fibers of the mass so as to produce a finished composition of matter of uniform fibrous structure and extreme hardness and toughness. Preferably this device comprises a machine somewhat similar to anordinary sausage grinder having a revolving screw but devoid of knives and terminating at its discharge end in a tube through which the mass is forced by pressure of the revolving screw. The pressure of the revolving screw in forcing the material through the discharge tube presses the fibers of the mass intimately together, while the resistance of the discharging mass against turning in the tube, together with the action of the screw in revolving the matter as it enters the tube, results in disposing a large portion of the fibers of the massspi rally with respect to the axis of the tube. This combined pressure and torque operates to intimately intermingle the fibers of the mass of material and render the composition of matter extremely tough.

The cylindrical mass of matter thus ex- I truded is now partially dried, and then out 1nto sections of the requisite length, which are permitted to stand on drying racks until they are thoroughly dry. After being dried the sections are placed in a hydraulic press between dies suitable to mold them to any desired form, for instance, rollers for skates. While in the the press the material is surrounded by a steam heatedmetal jacket by ,means'of which it is heated sufficiently to render the dried glue viscous but not liquid. The steam is kept entirely separate from the material in order to keep the material dry,

and the degree of heat is only sufficient to so V soften the glue as to render it pliable while preventing such fluidity in it as would cause it to gravitate to the bottom of the mass and leave the upper portion ofthe mass free from glue. A temperature somewhat over 200 Fahr. found practicable. The amount of pressure given to the mass in the hydraulic press is approximately seven tens to the square inch, this being greatly in excess of the pressure exerted upon the mass in the extruding machine. The result of the action of the press is to provide an article of uniform texture which, because of its toughness, will withstand great strainand by reason of the hardener it contains is very long lived under constant wear. The presence of the oxid of iron in the mass of material causes the material when under the action of the press, to be greatly darkened in color, a quality which in certain lines of manufacture is desirable.

Should the comp0sitionofmatter be intended for use in makingfwheelsfor roller skates, for example, the screw-10f the extruding machine is provided with an axially extending rod which traverses the discharge tube concentrically and gives the extruded mass the shape of an elongated cylinder having a central bore. In the manufacture of wheels this elongated cylinder is, divided into lengths or sections approximately 15'; inches long which shrink but slightly in' the subsequent drying process and under the action of the press are reduced to i of an inch in length-the elongated cylinder coming from the extruding machine being of.

approximately the same diameter as the finished skate Wheel taken from the press.

It will be manifest that the novelcomposition produced by my improved process possesses characteristics which render it particularly suitable for skate wheels. Wheels of this character are" subjected to extremely rough usage and must consequently possess great strength and wearing qualities. The

. strength and toughness of my composition are partially due to the manner in which the fibers are disposed and interlocked by the extruding machine. The extreme hardness and extraordinary wearing qualities of my composition are derived from the pulverized hard granular silica or similar material used as the hardener. Chalk or a similar material employed in lieu of my granular hard-' ener might not be distinguishable in the finished article but repeated experiments have conclusively shown that a composition embodying such a substitute would not wear or stand up in use anywhere near as long as the composition embodying a hardener as hereinbefore described and hereinafter claimed.

I claim: 1. A composition of matter comprising ingredients in substantially the following proportions 105 pounds of paper pulp, 60 pounds of granular hardener, 1 pound of potassium bichromate, and pounds of glue.

2. A composition of matter comprising 105 pounds of paper pulp, pounds of a granular hardener, one pound of potassium bichromate, 55 pounds of glue, and 2 pounds of iron oxid.

3. A composition of matter comprising 105 pounds of paper pulp, 60 pounds of a granular hardener, one pound ofpotassium bichromate, 55 pounds. of glue, and two quarts of resin varnish. 4. A composition of matter comprising 105 pounds of paper pulp, 60 pounds of .a granular hardener, 1 pound of potassium bichromate, 55 pounds of glue, 2 pounds of iron oxid, and 2 quarts of resin varnish.

5. A composition article adapted for skate wheels and the like, comprising a fibrous JOHN W. TALBOT. 

